1278

1278 is a natural number that comes after 1277 and before 1279. In mathematics, it is an even composite number with prime factorization 2 × 3^2 × 71. As such, it is divisible by 2, 3, 6, 9, 18, 71, 142, 213, 426, and 639, among others. The sum of its digits is 18, making 1278 a Harshad number in base 10 since 1278 ÷ 18 = 71. Its sum of divisors is 2808, which means 1278 is an abundant number (the sum of its proper divisors is 1530).

In other base representations, 1278 is written as binary 10011111110, hexadecimal 0x4FE, and in Roman numerals as MCCLXXVIII. In calendar terms, 1278 is the year 1278 CE, placing it in the late medieval period. It falls within the late 13th century, a time characterized by shifting political boundaries and regional developments across Europe, the Middle East, and Asia. Specific events tied to the year vary by region and source, and no single globally defining occurrence is universally associated with 1278.

Overall, 1278 is notable in number theory for its factorization and divisibility properties, and in calendrical terms as a year within the broader context of medieval history.